Article 4 Descriptions of radioactive material to which exemption relates
The last preceding Article applies to radioactive material falling within any of the following descriptions, that is to say,—
a solid or liquid substance which—
contains natural uranium, and is radioactive material solely because of the presence of one or more of the Schedule 3 elements in the natural uranium; or
contains natural thorium, and is radioactive material solely because of the presence of one or more of the Schedule 3 elements in the natural thorium; or
contains both natural uranium and natural thorium, and is radioactive material solely because of the presence of one or more of the Schedule 3 elements in the natural uranium and the natural thorium or either of them;
an article made wholly from such a substance;
an article which is made partly from, or incorporates, such a substance and which is radioactive material solely because of the presence of that substance.